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You seem to be attempting to access an item that has been removed from the repository.
There is a later version of the item you are trying to access:
Valvi, Aikaterini C. and Fragkos, K.C.
(2012)
Critical review of the e-loyalty literature: a purchase-centred framework.
Electronic Commerce Research 12
(3),
pp. 331-378.
ISSN 1389-5753.